Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b02a70178a63877…

MALICIOUS

PDF

74.2 KB Created: 2021-03-26 03:15:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8fc0c82584b94a62a0476e85567abea8 SHA-1: 48802afc3a54cdcdd3317cb4921ddffb788ac767 SHA-256: 0b02a70178a6387755a714e7f6b8e05ab9bd5da811667281cc7f4baa3f4f2878
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the 'link farm' heuristic strongly indicate an attempt to direct users away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kuzutuzo.ru/123?utm_term=social+media+platforms+similar+to+facebook PDF link annotation
    • http://bluetea.space/how_do_parents_see_portfolios_on_class_dojoojsoq.pdfIn PDF document text
    • http://daliadiago.com/what_is_the_difference_between_honda_power_steering_fluid_and_regular_power_steering_fluidy6xc9.pdfIn PDF document text
    • http://temilops.xyz/is_meshare_and_zmodo_the_same1cw1t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391909/normal_5ffc30e44d3c7.pdfIn PDF document text
    • http://whalesqpa.fun/kijatagewevahhcv7.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/autism_diagnostic_interview_revised_adi_r.pdfIn PDF document text
    • http://milanomoda-italy.website/bontrager_trip_300_speed_sensorjt0em.pdfIn PDF document text
    • http://itsnat.space/how_to_get_a_duplicate_drivers_license_in_mississippinvld8.pdfIn PDF document text
    • http://liketime.online/how_to_setup_panasonic_kx_tes824pphwx.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/58343586897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_6032ce3cb1e2e.pdfIn PDF document text
    • http://nesegejisivinu.medianewsonline.com/spanish_story_books_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451555/normal_601581cb3483f.pdfIn PDF document text
    • http://4gusevshop.website/salrio_mnimo_madeira_2020_decreto_leikxles.pdfIn PDF document text
    • http://opros.xyz/799654720709vu1t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481825/normal_60027cf154608.pdfIn PDF document text
    • http://fegiroxopirez.sportsontheweb.net/baofeng_uv_5r_plus_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/has_anyone_died_at_disneyland.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_2cdc602dc17f48f0b784f9ec89b3fc77.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_1d1795a7f3b648059058392731c4af79.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/zikex.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/how_to_make_a_real_christmas_tree_look_fuller.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/the_juans_balisong_lyrics.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_6f0210f3048b4d1f92c8d52c169f66fc.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11E 5608 bytes
SHA-256: e913b13cf4283bd0b6c899a364e2d8ea3ae3c57adbeec75db4ba2a9d89ed8115
font_01_sfnt_off0000f416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF416 12212 bytes
SHA-256: cd80f85c4ec009c0ba0909a78cea132a01b02f4b84338b48019c22057f75c8dc

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